Caio Rocha 40295df4c4 Adding Support to bf16 Executor Tests (#801) ...

This pull request adds support for the `bfloat16` (bf16) data type to
the test executor, including both Python and CUDA components. The
changes ensure that `bfloat16` is handled consistently across argument
parsing, data type conversion, and test kernel implementations.
Additionally, the CUDA verification kernels are refactored to use
parameterized tolerances for improved numerical accuracy checks.

**Support for bfloat16 data type:**

* Added handling for `bfloat16`/`bf16` in the Python test executor's
argument parsing, data type conversion (`parse_dtype`,
`dtype_to_mscclpp_dtype`), and help text.
[[1]](diffhunk://#diff-e643968a8622d1603868a8ecf4b2fcd8108be1e404a3420bb7e2a6d51dc23fdcR27-R28)
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* Updated output to display the correct data type string for `bfloat16`.

**CUDA kernel and test improvements:**

* Included `bfloat16` headers and defined test data fill and gather
kernels for `bfloat16` on both CUDA and HIP platforms.
[[1]](diffhunk://#diff-e18b8becff1c3b234733f5ca3250a76ffdc5edddb302c2da098b64b00ba7cf88R8-R11)
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* Refactored verification kernels (`ALL_REDUCE`, `REDUCE_SCATTER`) to
use an explicit tolerance parameter (`Eps`) and added correct tolerances
for each data type, including `bfloat16`.
[[1]](diffhunk://#diff-e18b8becff1c3b234733f5ca3250a76ffdc5edddb302c2da098b64b00ba7cf88L69-R85)
[[2]](diffhunk://#diff-e18b8becff1c3b234733f5ca3250a76ffdc5edddb302c2da098b64b00ba7cf88L94-R113)

These changes ensure full support for `bfloat16` in the test executor
and improve the accuracy and maintainability of the CUDA test kernels.

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Co-authored-by: Caio Rocha <caiorocha@microsof.com>

2026-05-14 09:56:11 -07:00

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